Propane tank safety pressure vent valve



FIG. 1 is an exploded perspective view of a propane tank safety pressure vent valve, showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The fragmentary broken line representation of a propane tank in FIG. 2 is for purposes of illustration only and forms no part of the claimed design. 

The ornamental design for a propane tank safety pressure vent valve, as shown and described. 